Improvement in preparing dental fillings



a. S. W|.Ll.lAMS.

Preparing Dental Filling.

N0 I67 813 Patenled Sept.l4,l875.

Witnesses: v [7276725071 54m 41%!Zm N.PETERS, PMQ'O-LITHOGRAPHER. WASHINGTON. D C,

UNITED STATES PATENT Orrroa.

RICHARD S. WILLIAMS, OF NEW YORK, N. Y.

IMPROVEMENT lN PREPARING DENTAL FILLINGS.

Specification forming part of Letters Patent No. 167,813, dated September 14, 1875; application filed June 7,1875.

To all whom it may concern Be it known that-I, RICHARD S. WILLIAMS, of the city, county, and State of New York, have invented a new anduseful Improvement in Process for Preparing Dental Filling; and that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

This invention is in the nature of an improvement in process for preparing dental filling; and the invention consists in the process, hereinafter particularly described, for preparing dental foil when made into blocks, cylinders, cubes, pellets, &c., by causing the 4 last or overlapping fold, when the foil is made up into such forms, to adhere to the fold next immediately beneath it by or with the aid of collodion or other volatile solvent.

In the accompanying sheet of drawings, Figure 1 represents a sheet of plain foil. Figs. 2 and 3 represent sheets of dental foil prepared with corrugated or granulated surfaces. Figs. 4. and 5 represent the same formed into rectangular bars and cubical sections. Fig. 6 represents a rectangular bar with cubical and other sections of tin with slightly roughened surface. Fig. 7 represents a rectangular bar of tin or other foil, having plain surface, and sections with rounded edges 5 and .Fig. 8 represents a cylinder made from plain foil with sections.

Similar letters of reference indicate like parts in the several figures.

A represents a sheet of plain foil, and B and 0 represent sheets of foil with granulated or roughened surfaces.

These foils, whether plain or granulated, may be formed from gold, silver, platina, tin, or any other suitable metal.

If the surfaces of the foil are roughened or granulated, it may be done either in the wellknown manner by shrinkage between paper under pressure and by heat, or it may he granulated or roughened by confining the sheets of foil beneath or between sheets of stretched india-rubber, which, when allowed to contract, will draw up the foil so confined or placed; or it may be roughened in any suitable way, the roughening of the surfaces making no part of the present invention.

The foil having been suitably prepared, either in a plain or roughened state, as before described, it is formed up into squares, parallelopipeds, cylinders, or any other convenient shape, and to the last or overlapping layer a a film of collodion or ether, or other volatile substance, holding any suitable gum in solution, is applied to it. The volatile fluid evaporating, causes the layer to adhere to the body ot' the cylinder, &;c., by the remaining gum. The substance thus remaining is peculiarly adapted for the purpose of causing the overlapping fold to adhere, for the reason that it is tasteless, inodorous, elastic, transparent, and almost imperceptible and wholly innoxious.

The sections of cylinders, blocks, &c., that are made from the larger rolls or other figures,

are formed by cutting them from these larger ters Patent, is-- The process hereinbefore described of preparing foil for dental purposes, by causing the last or overlapping layer of foil to adhere to the fold next beneath it by or with the aid of collodion or other substances dissolved in a volatile fluid," substantially as described.

RIOHD. S. WILLIAMS.

Witnesses:

H. L. WATTENBERG, G. M. PLYMPToN. 

